منابع مشابه
Do Financial Returns Have Finite or Infinite Variance? a Paradox and an Explanation
One of the major points of contention in studying and modeling nancial returns is whether or not the variance of the returns is nite or in nite (sometimes referred to as the Bachelier-Samuelson Gaussian world versus the Mandelbrot stable world). A di erent formulation of the question asks how heavy the tails of the nancial returns are. The available empirical evidence can be, and has been, inte...
متن کاملFinite- and Infinite-time Ruin Probabilities in the Presence of Stochastic Returns on Investments
This paper investigates the finiteand infinite-time ruin probabilities in a discrete-time stochastic economic environment. Under the assumption that the insurance risk – the total net loss within one time period – is extended-regularly-varying tailed or rapidly-varying tailed, various precise estimates for the ruin probabilities are derived. In particular, some estimates obtained are uniform wi...
متن کاملExpectations of Returns and Expected Returns
We analyze time series of investor expectations of future stock market returns from six data sources between 1963 and 2011. The six measures of expectations are highly positively correlated with each other, as well as with past stock returns and with the level of the stock market. However, investor expectations are strongly negatively correlated with model-based expected returns. The evidence i...
متن کاملinfinite dimensional garch models
مدلهای گارچ در فضاهای هیلبرت پایان نامه حاضر شامل دو بخش می باشد. در قسمت اول مدلهای اتورگرسیو تعمیم یافته مشروط به ناهمگنی واریانس در فضاهای هیلبرت را معرفی، مفاهیم ریاضی مورد نیاز در تحلیل این مدلها در دامنه زمان را مطرح کرده و آنها را مورد بررسی قرار می دهیم. بر اساس پیشرفتهایی که اخیرا در زمینه تئوری داده های تابعی و آماره های عملگری ایجاد شده است، فرآیندهایی که دارای مقادیر در فضاهای ...
15 صفحه اولDwindling returns
fleets must shrink. But this needs to be set against a rise in catches, an overall climb in incomes for coastal communities and companies, improvements in the health of the marine environment and ultimately hundreds of millions of people whose incomes and livelihoods are linked to fishing, " he said. The report estimates that there are currently 35 million people fishing for a livelihood and mo...
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ژورنال
عنوان ژورنال: Art Journal
سال: 2020
ISSN: 0004-3249,2325-5307
DOI: 10.1080/00043249.2020.1724027